Heating furnace with fuel screening function

Abstract

The invention discloses a heating furnace with a fuel screening function, and relates to the technical field of combustion furnaces, the heating furnace comprises a furnace body, a hearth is arranged in the furnace body, an ash bucket is arranged below the hearth, a volute circulating fan is arranged below the furnace body, and the volute circulating fan is used for heat insulation and heat dissipation of the furnace body. A plurality of corrugated smoke exhaust pipes, a feeding assembly, an igniter, an oxygen supply pipe and a central control machine box are arranged on the rear side of the furnace body, a winnowing material preparation assembly is arranged at the top of the furnace body, a smoke exhaust fan is arranged at the bottom of the furnace body, the igniter extends into a hearth, one ends of the corrugated smoke exhaust pipes are connected with a suction port of the smoke exhaust fan, and the other ends of the corrugated smoke exhaust pipes are connected with the central control machine box. An air supply outlet of the smoke exhaust fan is connected with an outer smoke exhaust pipe, heat scattered on the two sides and the rear side of the furnace body is dissipated through flowing of airflow through the volute circulating fan, hot air blown out of the air outlet supplies heat to the surrounding environment, and meanwhile equipment on the rear side of the furnace body is prevented from being damaged due to overheating.

Description

Technical Field

[0001] The invention relates to the technical field of combustion furnaces, in particular to a heating furnace with a fuel screening function. Background Art

[0002] A heating furnace is a device used to heat indoor spaces. It is mainly used to provide warmth for homes, offices or other buildings in cold climates. It generates heat by burning fuel (such as natural gas, fuel oil, coal, wood, etc.) or using electricity, and distributes heat to different areas of the room by heating the air or water. A heating furnace is an important device for daily heating for people living in cold climates. The choice of which heating furnace to use should be based on local energy supply conditions, building area, usage habits and other factors. The heating furnace fuel consumes oxygen when burning, and well-sealed indoor rooms may be at risk of hypoxia. The negative pressure in the room accelerates the convection of indoor and outdoor air, and cold air comes in, affecting the heating efficiency. Some heating furnaces have separate air inlets, but they need to be drilled separately, which makes installation and use troublesome. Most heating furnace fuels need to be prepared in advance, and it is not easy to use large pieces of wood directly. Therefore, it takes manpower to process the fuel in advance, and there are many inconveniences during use. Summary of the invention

[0003] The object of the present invention is to provide a heating furnace with a fuel screening function to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a heating furnace with a fuel screening function, comprising a furnace body, a furnace chamber is arranged in the furnace body, an ash hopper is arranged below the furnace chamber, a volute circulation fan is arranged below the furnace body, the volute circulation fan insulates and dissipates heat for the furnace body, a plurality of corrugated smoke exhaust pipes, a feeding assembly, an igniter, an oxygen supply pipe and a central control box are arranged on the rear side of the furnace body, a wind selection and preparation assembly is arranged on the top of the furnace body, a smoke exhaust fan is arranged on the bottom of the furnace body, the igniter extends into the interior of the furnace chamber, one end of the plurality of corrugated smoke exhaust pipes is connected to the suction port of the smoke exhaust fan, and the air supply port of the smoke exhaust fan is connected to an external smoke exhaust pipe.

[0005] Heat sink reinforcement ribs are arranged on both sides and the top of the furnace body, and side wind hoods are connected to the heat sink reinforcement ribs on both sides of the furnace body. An air inlet is arranged on the top of the side wind hood, and a top heat insulation pad is arranged above the heat sink reinforcement ribs on the top of the furnace body. An air outlet is arranged at the front end of the top heat insulation pad. The heat generated when the furnace burns is radiated outward through the furnace body. The volute circulation fan is powered on, and the outside air flows downward through the air inlet on the top of the side wind hood, flows upward from the rear of the furnace body after passing through the volute circulation fan, and finally flows out from the air outlet at the front end of the top heat insulation pad. The heat scattered on the two sides and the rear side of the furnace body is dissipated through the flow of airflow, and the hot air blown out from the air outlet heats the surrounding environment, while preventing the equipment on the rear side of the furnace body from being overheated and damaged, thereby collecting heat and protecting the equipment.

[0006] The smoke exhaust fan of the embodiment of the present invention is connected with the smoke exhaust pipe of the present invention, and the smoke exhaust fan of the present invention is connected with the smoke exhaust pipe of the present invention.

[0007] The feeding assembly includes a silo, a feeding motor, an auger and a discharge pipe. The feeding motor is arranged at the bottom of the silo, the auger is arranged inside the silo, the auger is arranged at an angle, the motor shaft of the feeding motor is coaxially connected with one end of the bottom of the auger, a partition pipe is arranged in the silo near the top of the auger, one end of the discharge pipe is connected with the partition pipe, and the other end of the discharge pipe is connected with the furnace, and the slag fuel is stored in the silo, and the central control chassis controls the rotation of the feeding motor. When the feeding motor drives the auger to rotate, the slag fuel in the silo rises, and the slag fuel finally slides into the furnace through the discharge pipe, the igniter ignites the slag fuel for combustion, the auger continuously feeds fuel into the furnace, and the burning ashes fall into the ash hopper for collection together for unified dumping.

[0008] The oxygen supply pipe is connected with the furnace, and an air distribution plate is provided at the bottom of the furnace. The air distribution plate leads the gas in the oxygen supply pipe to the front end of the furnace body. There is a part that fits each other between the air inlet end of the oxygen supply pipe and the external smoke exhaust pipe. Therefore, the air in the oxygen supply pipe exchanges heat with the exhausted flue gas before being supplied to the furnace, so as to achieve the effect of preheating the air, thereby improving the efficiency of heating. Part of the air in the oxygen supply pipe enters the furnace to support fuel combustion, and the other part flows out from the front end of the furnace body. Since the interior of the furnace is a negative pressure environment, the air flowing out from the front end of the furnace body will also flow into the furnace, forming a wind curtain to block the flue gas, further preventing the flue gas from flowing out.

[0009] The air separation material preparation component includes an air separation bin, several crushing rollers, a feeding hopper, an inner cylinder, an outer saw blade and an inner saw blade. The air separation bin is arranged on the top of the hopper. Several crushing rollers are rotatably installed in the air separation bin. One end of each crushing roller is connected to a driving motor. The inner cylinder is arranged at the upper end of the air separation bin. The feeding hopper is arranged at the upper end of the inner cylinder. The outer saw blade and the inner saw blade are installed in the inner cylinder. Wood is put into the feeding hopper, and the outer saw blade and the inner saw blade cut and decompose the wood. The crushing roller further cuts and crushes the cut wood to form slag fuel that falls into the hopper for storage.

[0010] One side of the air separation bin is connected with an air guide plate, one end of which is arranged at the air outlet at the front end of the top insulation pad, and an ash falling trough is arranged at the end of the air separation bin away from the air guide plate, and the ash falling trough is connected with the ash hopper through a pipeline, and a small part of the hot air blown out of the air outlet is guided into the air separation bin through the air guide plate, and the crushed slag fuel passes through the guide wind area during the falling process, and the fine wood ash is blown into the ash falling trough by the guide wind, while the crushed slag fuel falls normally. Before preparing the crushed slag fuel, the light wood ash is separated in advance to prevent the wood ash from accumulating in the equipment with the smoke, thereby reducing the cleaning frequency of the equipment and saving the maintenance cost of the equipment.

[0011] A spiral cutting edge groove is formed on each of the shredder rollers, and the cutting edge grooves on each two adjacent shredder rollers rotate in opposite directions. A pair of outer clamps and a pair of inner clamps are slidably arranged in the inner cylinder. The pair of outer clamps are symmetrically installed, and the outer saw blade is slidably connected to the pair of outer clamps. The pair of inner clamps are also symmetrically installed, and the inner saw blade is slidably connected to the pair of inner clamps. A first motor is provided in one of the outer clamps, and a friction wheel is installed on the first motor, and the friction wheel is in contact with the inner ring of the outer saw blade. A first motor and a friction wheel are also provided in one of the inner clamps, and the arrangement of the first motor and the friction wheel is the same as that in the outer clamp. The central control box controls the two first motors to be energized, and the first motor drives the friction wheel to rotate. The friction wheel drives the outer saw blade and the inner saw blade to rotate rapidly through friction force. The rotation of the outer saw blade and the inner saw blade does not interfere with each other, and the wood put into the feeding hopper is cut and decomposed.

[0012] The inner cylinder is provided with two pairs of slide grooves, and an upper bevel gear ring and a lower bevel gear ring are rotatably arranged on the outer side of the inner cylinder. A pair of the outer clamps extend out of the slide grooves and are connected to the lower bevel gear ring, and a pair of the inner clamps extend out of the slide grooves and are connected to the upper bevel gear ring. A second motor is also installed on the top of the air selection bin, and a driving bevel gear is installed on the motor shaft of the second motor. The driving bevel gear is meshed and connected with the upper bevel gear ring and the lower bevel gear ring. While the outer saw blade and the inner saw blade decompose the wood, the second motor drives the driving bevel gear to repeatedly rotate forward and reverse, driving The movable bevel gear drives the upper bevel gear ring and the lower bevel gear ring to slide along the outer surface of the inner cylinder during the rotation process. The upper bevel gear ring moves in opposite directions to the lower bevel gear ring. The upper bevel gear ring drives the inner saw blade to deflect as a whole through the inner clamp, and the lower bevel gear ring drives the outer saw blade to deflect as a whole through the outer clamp, so that the outer saw blade and the inner saw blade are constantly staggered with each other. The staggered torque between the outer saw blade and the inner saw blade is used to split the wood being cut, which helps to crush the wood more thoroughly. The crushed wood is then broken into small pieces by the chipping roller and stored in the silo.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The heat generated when the furnace burns radiates outward through the furnace body. The heat scattered on both sides and the rear side of the furnace body is dissipated through the flow of air through the volute circulation fan. The hot air blown out from the air outlet heats the surrounding environment and prevents the equipment on the rear side of the furnace body from overheating and damage, thereby collecting heat and protecting the equipment.

[0014] 2. The interior of the furnace is a negative pressure environment. On the one hand, it helps the air in the oxygen supply pipe flow into the furnace, which helps combustion to occur. On the other hand, it helps to absorb the smoke produced by combustion, preventing the smoke from diffusing from the furnace into the surrounding environment. The air flowing out from the front end of the furnace body will also flow into the furnace, forming a wind curtain to block the smoke, further preventing the smoke from flowing out.

[0015] 3. By controlling the upper bevel gear ring and the lower bevel gear ring to move in opposite directions, the upper bevel gear ring drives the inner saw blade to deflect as a whole through the inner clamp, and the lower bevel gear ring drives the outer saw blade to deflect as a whole through the outer clamp, so that the outer saw blade and the inner saw blade are constantly staggered with each other, and the staggered torque between the outer saw blade and the inner saw blade is used to split the wood being cut, which helps to crush the wood more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 It is a schematic diagram of the partial appearance structure of the present invention; Figure 3 It is a structural schematic diagram of the heat sink reinforcement ribs inside the furnace body of the present invention; Figure 4It is a schematic diagram of the fuel supply movement of the present invention; Figure 5 It is a schematic diagram of the heat dissipation airflow movement of the present invention.

[0017] Figure 6 Schematic diagram of the oxygen supply tube forming an air curtain according to the present invention.

[0018] Figure 7 It is a schematic diagram of the smoke movement of the present invention.

[0019] Figure 8 It is a structural schematic diagram of the wind selection and material preparation component of the present invention.

[0020] Fig. 9 It is a schematic diagram of the internal structure of the air separation bin of the present invention.

[0021] Fig.10 It is a schematic diagram of the internal structure of the inner cylinder of the present invention.

[0022] Fig.11 It is a schematic diagram of the structure of the outer clamp and the inner clamp of the present invention.

[0023] In the figure: 1. furnace body; 2. furnace chamber; 3. ash hopper; 4. side wind hood; 5. top insulation pad; 6. volute circulation fan; 7. silo; 8. feeding motor; 9. auger; 10. feeding pipe; 11. igniter; 12. oxygen supply pipe; 13. corrugated exhaust pipe; 14. exhaust fan; 15. external exhaust pipe; 16. heat sink reinforcement rib; 17. fire baffle; 18. central control box; 19. air guide plate; 20. air separation bin; 21. crushing roller; 22. feeding hopper; 23. inner cylinder; 24. outer saw blade; 25. inner saw blade; 26. outer clamp; 27. inner clamp; 28. first motor; 29. ​​second motor; 30. upper bevel gear ring; 31. lower bevel gear ring; 32. driving bevel gear; 33. friction wheel. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example: Figure 1-Figure 11As shown, the present invention provides a technical solution, a heating furnace with a fuel screening function, comprising a furnace body 1, a furnace 2 is arranged in the furnace body 1, an ash hopper 3 is arranged below the furnace 2, a volute circulation fan 6 is arranged below the furnace body 1, and the volute circulation fan 6 insulates and dissipates heat for the furnace body 1, a plurality of corrugated smoke exhaust pipes 13, a feeding assembly, an igniter 11, an oxygen supply pipe 12 and a central control box 18 are arranged on the rear side of the furnace body 1, a wind selection and preparation assembly is arranged on the top of the furnace body 1, a smoke exhaust fan 14 is arranged on the bottom of the furnace body 1, the igniter 11 extends into the furnace 2, and a plurality of corrugated ... One end of the smoke pipe 13 is connected to the suction port of the smoke exhaust fan 14, and the air supply port of the smoke exhaust fan 14 is connected to the external smoke exhaust pipe 15. Heat sink reinforcement ribs 16 are arranged on both sides and the top of the furnace body 1. The heat sink reinforcement ribs 16 located on both sides of the furnace body 1 are connected to the side wind hood 4, and the top of the side wind hood 4 is provided with an air inlet. A top insulation pad 5 is arranged above the heat sink reinforcement ribs 16 located on the top of the furnace body 1, and an air outlet is arranged at the front end of the top insulation pad 5. The oxygen supply pipe 12 is connected to the furnace chamber 2, and a gas distributor is arranged at the bottom of the furnace chamber 2. The gas distributor leads the gas in the oxygen supply pipe 12 to the front end of the furnace body 1.

[0026] The heat generated when the furnace burns is radiated outward through the furnace body 1, and the volute circulation fan 6 is powered on. The external air flows downward through the air inlet on the top of the side wind cover 4, and after passing through the volute circulation fan 6, it flows upward from the rear of the furnace body 1, and finally flows out from the air outlet at the front end of the top insulation pad 5. The heat scattered from the two sides and the rear side of the furnace body 1 is dissipated through the flow of airflow. The hot air blown out from the air outlet heats the surrounding environment, and at the same time prevents the equipment on the rear side of the furnace body 1 from being overheated and damaged, and plays the role of collecting heat and protecting the equipment. The oxygen supply pipe 1 There is a part that fits each other between the air inlet end of 2 and the external smoke exhaust pipe 15. Therefore, the air in the oxygen supply pipe 12 exchanges heat with the exhausted flue gas before being supplied to the furnace 2, so as to achieve the effect of preheating the air, which can improve the efficiency of heating. Part of the air in the oxygen supply pipe 12 enters the furnace 2 to support fuel combustion, and the other part flows out from the front end of the furnace body 1. Since the interior of the furnace 2 is a negative pressure environment, the air flowing out from the front end of the furnace body 1 will also flow into the furnace 2, forming a wind curtain to block the flue gas, thereby further preventing the flue gas from flowing out.

[0027] Several corrugated smoke exhaust pipes 13 are arranged between the furnace body 1 and the feeding assembly. A fire baffle 17 is arranged on the top of the furnace 2. The fire baffle 17 is arranged obliquely. One end of each corrugated smoke exhaust pipe 13 is connected to the furnace 2 in the area blocked by the fire baffle 17. The bottoms of all the corrugated smoke exhaust pipes 13 are connected together through pipes. The pipes connected together by the corrugated smoke exhaust pipes 13 are connected to the suction port of the smoke exhaust fan 14. When the furnace is burning and heating, the central control box 18 starts the smoke exhaust fan 14 through the circuit, and the smoke exhaust fan 14 is blown from the corrugated smoke exhaust pipe 13. The exhaust causes the air pressure in the furnace 2 to decrease. In the negative pressure environment of the furnace 2, on the one hand, it helps the air in the oxygen supply pipe 12 to flow into the furnace 2, which helps combustion to occur. On the other hand, it helps the smoke generated by the combustion to be sucked away, preventing the smoke from diffusing from the furnace 2 to the surrounding environment. The fire baffle 17 blocks the open flame to prevent the open flame from burning the corrugated smoke exhaust pipe 13, thereby ensuring that only smoke enters the corrugated smoke exhaust pipe 13, and the smoke enters the external smoke exhaust pipe 15 through the smoke exhaust fan 14 and is discharged through the external smoke exhaust pipe 15.

[0028] The feeding assembly includes a silo 7, a feeding motor 8, an auger 9 and a discharge pipe 10. The feeding motor 8 is arranged at the bottom of the silo 7, the auger 9 is arranged inside the silo 7, the auger 9 is arranged at an angle, the motor shaft of the feeding motor 8 is coaxially connected with one end of the bottom of the auger 9, a partition tube is arranged at a position near the top of the auger 9 in the silo 7, one end of the discharge pipe 10 is connected with the partition tube, and the other end of the discharge pipe 10 is connected with the furnace 2, and the slag fuel is stored in the silo 7, and the central control box 18 controls the feeding motor 8 to rotate. When the feeding motor 8 drives the auger 9 to rotate, the slag fuel in the silo 7 is raised, and the slag fuel finally slides into the furnace 2 through the discharge pipe 10, and the igniter 11 ignites the slag fuel for combustion. The auger 9 continuously feeds fuel into the furnace 2, and the burning ashes fall into the ash hopper 3 for collection together for unified dumping.

[0029] The wind selection material preparation assembly includes a wind selection bin 20, several crushing rollers 21, a feeding hopper 22, an inner cylinder 23, an outer saw blade 24 and an inner saw blade 25. The wind selection bin 20 is arranged on the top of the silo 7, and several crushing rollers 21 are rotatably installed in the wind selection bin 20. One end of each crushing roller 21 is connected to a driving motor (not shown in the figure), the inner cylinder 23 is arranged at the upper end of the wind selection bin 20, the feeding hopper 22 is arranged at the upper end of the inner cylinder 23, the outer saw blade 24 and the inner saw blade 25 are installed in the inner cylinder 23, and one side of the wind selection bin 20 is connected to an air guide plate 19, one end of the air guide plate 19 is arranged at the air outlet at the front end of the top insulation pad 5, and the end of the wind selection bin 20 away from the air guide plate 19 is provided with a ash drop The ash chute is connected with the ash hopper 3 through a pipeline, and the wood is put into the feeding hopper 22. The outer saw blade 24 and the inner saw blade 25 cut and decompose the wood. The chipping roller 21 further cuts and crushes the cut wood to form slag fuel which falls into the silo 7 for storage. A small part of the hot air blown out of the air outlet is guided to the air separation bin 20 through the air guide plate 19. The slag fuel passes through the guide wind area during the falling process, and the fine wood ash is blown into the ash chute by the guide wind, while the slag fuel falls normally. Before preparing the slag fuel, the light wood ash is separated in advance to prevent the wood ash from accumulating in the equipment with the smoke, thereby reducing the cleaning frequency of the equipment and saving the maintenance cost of the equipment.

[0030] A spiral cutting edge groove is provided on each shredder roller 21, and the rotation directions of the cutting edge grooves on every two adjacent shredder rollers 21 are opposite. A pair of outer clamps 26 and a pair of inner clamps 27 are slidably provided in the inner cylinder 23. The pair of outer clamps 26 are symmetrically installed. The outer saw blade 24 is slidably connected to the pair of outer clamps 26. The pair of inner clamps 27 are also symmetrically installed. The inner saw blade 25 is slidably connected to the pair of inner clamps 27. A first motor 28 is provided in one of the outer clamps 26. A friction wheel 33 is installed on the first motor 28. The friction wheel 33 contacts the inner ring of the outer saw blade 24. A friction wheel 33 is also provided in one of the inner clamps 27. There are a first motor 28 and a friction wheel 33. The setting mode of the first motor 28 and the friction wheel 33 is the same as that in the outer clamp 26. Two pairs of slide grooves are opened on the inner cylinder 23. The outer side of the inner cylinder 23 is rotatably provided with an upper bevel gear ring 30 and a lower bevel gear ring 31. A pair of outer clamps 26 extend out of the slide grooves and are connected to the lower bevel gear ring 31. A pair of inner clamps 27 extend out of the slide grooves and are connected to the upper bevel gear ring 30. A second motor 29 is also installed on the top of the air selection bin 20. A driving bevel gear 32 is installed on the motor shaft of the second motor 29. The driving bevel gear 32 is meshed and connected with the upper bevel gear ring 30 and the lower bevel gear ring 31.

[0031] The central control box 18 controls the two first motors 28 to be energized, and the first motor 28 drives the friction wheel 33 to rotate. The friction wheel 33 drives the outer saw blade 24 and the inner saw blade 25 to rotate rapidly through friction. The rotation of the outer saw blade 24 and the inner saw blade 25 does not interfere with each other. The wood put into the feeding hopper 22 is cut and decomposed. While the outer saw blade 24 and the inner saw blade 25 decompose the wood, the second motor 29 drives the driving bevel gear 32 to repeatedly rotate forward and reverse. During the rotation process, the driving bevel gear 32 drives the upper bevel gear ring 30 and the lower bevel gear ring 31 along the inner bevel gear ring 31. The outer surface of the cylinder 23 slides, and the upper bevel gear ring 30 and the lower bevel gear ring 31 move in opposite directions. The upper bevel gear ring 30 drives the inner saw blade 25 to deflect as a whole through the inner clamp 27, and the lower bevel gear ring 31 drives the outer saw blade 24 to deflect as a whole through the outer clamp 26, so that the outer saw blade 24 and the inner saw blade 25 are constantly staggered with each other, and the staggered torque between the outer saw blade 24 and the inner saw blade 25 is used to split the wood being cut, which helps to crush the wood more thoroughly. The crushed wood is then broken into small pieces by the chipping roller 21 and stored in the silo 7.

[0032] The working principle of the present invention is as follows: the heat generated when the furnace burns is radiated outward through the furnace body 1, the volute circulation fan 6 is powered on, and the external air flows downward through the air inlet on the top of the side wind hood 4, and after passing through the volute circulation fan 6, it flows upward from the rear of the furnace body 1, and finally flows out from the air outlet at the front end of the top insulation pad 5, and the heat scattered on the two sides and the rear side of the furnace body 1 is dissipated through the flow of airflow, and the hot air blown out from the air outlet heats the surrounding environment, while preventing the equipment on the rear side of the furnace body 1 from overheating and damage, playing the role of collecting heat and protecting the equipment. Part of the air in the oxygen supply pipe 12 enters the furnace 2 to support fuel combustion, and the other part flows out from the front end of the furnace body 1. Since the interior of the furnace 2 is a negative pressure environment, the air flowing out from the front end of the furnace body 1 will also flow into the furnace 2, forming a wind curtain to block the smoke, further preventing the smoke from flowing out.

[0033] While the furnace is burning for heating, the central control box 18 starts the smoke exhaust fan 14 through the circuit. The smoke exhaust fan 14 draws air from the corrugated smoke exhaust pipe 13, causing the air pressure in the furnace 2 to decrease. In the negative pressure environment of the furnace 2, on the one hand, it helps the air in the oxygen supply pipe 12 to flow into the furnace 2, which helps combustion to occur. On the other hand, it helps the smoke generated by the combustion to be sucked away, preventing the smoke from diffusing from the furnace 2 to the surrounding environment. The fire baffle 17 blocks the open flame to prevent the open flame from burning the corrugated smoke exhaust pipe 13, thereby ensuring that only smoke enters the corrugated smoke exhaust pipe 13, and the smoke enters the external smoke exhaust pipe 15 through the smoke exhaust fan 14 and is discharged through the external smoke exhaust pipe 15.

[0034] The slag fuel is stored in the silo 7, and the central control box 18 controls the feeding motor 8 to rotate. The feeding motor 8 drives the auger 9 to rotate to lift the slag fuel in the silo 7. The slag fuel finally slides into the furnace 2 through the discharge pipe 10, and the igniter 11 ignites the slag fuel for combustion. The auger 9 continuously feeds fuel into the furnace 2, and the burning ashes fall into the ash hopper 3 and are collected together for unified dumping.

[0035] The wood is put into the feeding hopper 22, and the outer saw blade 24 and the inner saw blade 25 cut and decompose the wood. The chipping roller 21 further cuts and crushes the cut wood to form slag fuel which falls into the silo 7 for storage. A small part of the hot air blown out of the air outlet is guided to the air separation bin 20 through the air guide plate 19. The slag fuel passes through the guide wind area during the falling process, and the fine wood ash is blown into the ash falling trough by the guide wind, while the slag fuel falls normally. Before preparing the slag fuel, the light wood ash is separated in advance to prevent the wood ash from accumulating in the equipment with the smoke, thereby reducing the cleaning frequency of the equipment and saving the maintenance cost of the equipment.

[0036] The central control box 18 controls the two first motors 28 to be energized, and the first motor 28 drives the friction wheel 33 to rotate. The friction wheel 33 drives the outer saw blade 24 and the inner saw blade 25 to rotate rapidly through friction. The rotation of the outer saw blade 24 and the inner saw blade 25 does not interfere with each other. The wood put into the feeding hopper 22 is cut and decomposed. While the outer saw blade 24 and the inner saw blade 25 decompose the wood, the second motor 29 drives the driving bevel gear 32 to repeatedly rotate forward and reverse. During the rotation process, the driving bevel gear 32 drives the upper bevel gear ring 30 and the lower bevel gear ring 31 along the inner bevel gear ring 31. The outer surface of the cylinder 23 slides, and the upper bevel gear ring 30 and the lower bevel gear ring 31 move in opposite directions. The upper bevel gear ring 30 drives the inner saw blade 25 to deflect as a whole through the inner clamp 27, and the lower bevel gear ring 31 drives the outer saw blade 24 to deflect as a whole through the outer clamp 26, so that the outer saw blade 24 and the inner saw blade 25 are constantly staggered with each other, and the staggered torque between the outer saw blade 24 and the inner saw blade 25 is used to split the wood being cut, which helps to crush the wood more thoroughly. The crushed wood is then broken into small pieces by the chipping roller 21 and stored in the silo 7.

[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A heating furnace with a fuel screening function, comprising a furnace body (1), a furnace (2) being arranged in the furnace body (1), an ash hopper (3) being arranged below the furnace (2), characterized in that: A volute circulation fan (6) is arranged below the furnace body (1), and the volute circulation fan (6) insulates and dissipates heat for the furnace body (1). A plurality of corrugated smoke exhaust pipes (13), a feeding assembly, an igniter (11), an oxygen supply pipe (12) and a central control box (18) are arranged on the rear side of the furnace body (1). A wind selection and material preparation assembly is arranged on the top of the furnace body (1). A smoke exhaust fan (14) is arranged at the bottom of the furnace body (1). The igniter (11) extends into the interior of the furnace chamber (2). One end of the plurality of corrugated smoke exhaust pipes (13) is connected to a suction port of the smoke exhaust fan (14), and an air supply port of the smoke exhaust fan (14) is connected to an external smoke exhaust pipe (15).

2. The heating furnace with fuel screening function according to claim 1, characterized in that: Heat sink reinforcement ribs (16) are provided on both sides and the top of the furnace body (1); side wind shields (4) are connected to the heat sink reinforcement ribs (16) on both sides of the furnace body (1); an air inlet is provided on the top of the side wind shield (4); a top heat insulation pad (5) is provided above the heat sink reinforcement ribs (16) on the top of the furnace body (1); and an air outlet is provided at the front end of the top heat insulation pad (5).

3. The heating furnace with fuel screening function according to claim 1, characterized in that: A plurality of the corrugated smoke exhaust pipes (13) are arranged between the furnace body (1) and the feeding assembly, a fire baffle (17) is arranged on the top of the furnace (2), and the fire baffle (17) is arranged at an angle. One end of each of the corrugated smoke exhaust pipes (13) is connected to the furnace (2) in the area blocked by the fire baffle (17), and the bottoms of all the corrugated smoke exhaust pipes (13) are connected together through a pipe, and the pipe connecting the corrugated smoke exhaust pipes (13) is connected to the suction port of the smoke exhaust fan (14).

4. The heating furnace with fuel screening function according to claim 2, characterized in that: The feeding assembly comprises a silo (7), a feeding motor (8), an auger (9) and a feeding pipe (10); the feeding motor (8) is arranged at the bottom of the silo (7); the auger (9) is arranged inside the silo (7); the auger (9) is arranged tilted; the motor shaft of the feeding motor (8) is coaxially connected to one end of the bottom of the auger (9); a partition pipe is arranged at a position near the top of the auger (9) in the silo (7); one end of the feeding pipe (10) is connected to the partition pipe; and the other end of the feeding pipe (10) is connected to the furnace (2).

5. The heating furnace with fuel screening function according to claim 1, characterized in that: The oxygen supply pipe (12) is connected to the furnace (2), and a gas distribution plate is provided at the bottom of the furnace (2), and the gas distribution plate guides the gas in the oxygen supply pipe (12) to the front end of the furnace body (1).

6. The heating furnace with fuel screening function according to claim 4, characterized in that: The wind selection material preparation component comprises a wind selection bin (20), a plurality of crushing rollers (21), a feeding hopper (22), an inner cylinder (23), an outer saw blade (24) and an inner saw blade (25); the wind selection bin (20) is arranged at the top of the material bin (7); a plurality of crushing rollers (21) are rotatably installed in the wind selection bin (20); one end of each crushing roller (21) is connected to a driving motor; the inner cylinder (23) is arranged at the upper end of the wind selection bin (20); the feeding hopper (22) is arranged at the upper end of the inner cylinder (23); and the outer saw blade (24) and the inner saw blade (25) are installed in the inner cylinder (23).

7. The heating furnace with fuel screening function according to claim 6, characterized in that: One side of the air separation bin (20) is connected to an air guide plate (19), one end of the air guide plate (19) is arranged at the air outlet at the front end of the top heat insulation pad (5), and an ash falling trough is arranged at one end of the air separation bin (20) away from the air guide plate (19), and the ash falling trough is connected to the ash hopper (3) through a pipeline.

8. The heating furnace with fuel screening function according to claim 6, characterized in that: Each of the shredder rollers (21) is provided with a spiral cutting edge groove, and the cutting edge grooves on every two adjacent shredder rollers (21) have opposite rotation directions. A pair of outer clamps (26) and a pair of inner clamps (27) are slidably arranged in the inner cylinder (23), the pair of outer clamps (26) are symmetrically installed, the outer saw blade (24) is slidably connected to the pair of outer clamps (26), the pair of inner clamps (27) are also symmetrically installed, and the inner saw blade (25) is slidably connected to the pair of inner clamps (27); One of the outer clamps (26) is provided with a first motor (28), a friction wheel (33) is mounted on the first motor (28), and the friction wheel (33) is in contact with the inner ring of the outer saw blade (24). One of the inner clamps (27) is also provided with a first motor (28) and a friction wheel (33), and the arrangement of the first motor (28) and the friction wheel (33) is the same as that in the outer clamp (26).

9. The heating furnace with fuel screening function according to claim 8, characterized in that: The inner cylinder (23) is provided with two pairs of slide grooves, and an upper bevel gear ring (30) and a lower bevel gear ring (31) are rotatably provided on the outer side of the inner cylinder (23). A pair of the outer clamps (26) extend out of the slide grooves and are connected to the lower bevel gear ring (31), and a pair of the inner clamps (27) extend out of the slide grooves and are connected to the upper bevel gear ring (30). A second motor (29) is also installed on the top of the air separation bin (20), and a driving bevel gear (32) is installed on the motor shaft of the second motor (29). The driving bevel gear (32) is meshedly connected with the upper bevel gear ring (30) and the lower bevel gear ring (31).

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